Plunger for pumps



Sept. 29, 1925.

T. A. EDGERLY- PLUNGER FOR PUMPS Filed July 21. 1924 I mum 31a/ventola Patented Sept. 29, 1925.

UNITED' STATES TRUMAN A, upenn-LY, or omniumiirn only, oKLeHofMin,

PLUNGEB non` rUMrs.

Application filed July 21, V192.4. Serial No. 727,236.

To all fio/tom t may concern.'

Be it known that I, TnUMAN A. EDcnnLY, a citizen of the United States, residing at Oklahoma City, iii the county of Qldahoma and State of Oklahoma, have invented certain new and useful Improvements in Plungers. for Pumps, of which the following is a full, clear, .and exact description.

The invention relates to plungers er pistons for pumping all kinds of liquids or gases, but it is more particularly adapted for use in pumping oil wells. v

In pumping oil with the various types of pumps now known there is often much cut ting and cracking of the crude oil, thereby materially reducing the value of the oil and in some instances rendering it practically worthless. One. of the objects of the present invention is to avoid agitation Vof the oil or otherliquidbeing pumped, or at least reduceithe agitation to a minimum; and l. yaccomplish this by providing a free and unobstructed passage for the oil or other liquid being pumped.

'Further objects of the invention are to provide a plunger of this characterwhich is extremely simple iii-construction yand hence relatively inexpensive in manufacture; which will stand lhard usage, and which consists of such few parts that `there is practi cally no possibility of parts getting out of order, and consequently vthere is no loccasion for repairs until the packing is worn out.

Other objects and vadvantages of Ithe ifnvent'ion will be apparent; from the f villewing detailed description, when taken in connection with. the accompanying drawings, in which:

Figure 1 is a vertical rsectional view of a working barrel, and showing an elevational view of my improved plunger ar'- ranged therein; the conventional lower or standing valve is also shown, but it forms no part of the present invention.

Figure 2 is a vertical sectional view of the plunger; and

Figure 3 is a fragmentary sectional view, showing the lower portion of the plunger; the plunger being on its upstroke and hence the valve being' shown as closed.

Referring to the drawings more in detail, numeral l indicates the usual working barrel of an oil well, and mounted in the lower end thereof is the conventional lower or standing valve indicated by numeral 2.

The plunger is referred to generally by the numeral '3, and it is inthestructure .of this plunger `that .the present .invention resides. Numeral 4 indicates a tube Awhich :eX- tcnds fromthev-top 4to the bottom v-of thedevice, and mounted on the lower end of this tube is a lvalvemember 5,-whch is beveled to Icooperate with. a valvelseat yin a. manner to be described hereinafter. The valve member may be formed integral rwithV the .tube 4, if desired, vbut in 'the drawings I have illustrated the valve member as screw threadedly mounted on thetube. Thelower end of the tube, just above the ivalvememher 5, is provided with a pluralityof apertures 6. There are four of suchv apertures illustrated in the. drawings, but, of course, a greater o-r lesser number may be employed, -a-s desired.

The upper end of the tube :is screw .thread edly mounted-in acap member fr'. 'The 'lower portion of the cap member Ais hollefwI t0 :cemmunicate with theinterior of theztube t, .and apertures 8 are provided the vcap member to permit communication :between the interior ofthe cap andthe interior of the well tubing. Four ofthese a13 ertures are illustrated lin the drawings, but, .of Jcoui'se, .any desired number may be employed.; and it is to ibe noted :that thev apertures 8 are larger than apertures 6, the purpose being :to permfi'it a free exhaust ofthe oil, or other' liquid,

top itis obvious that .there is no ypessibility Aof the liquid 4becoming entrapped, thereby putting an' 4unnecessary load; onthe .pump and also increasing/the :agitation .ofithe'liq- By having the .'largerholesatithe uid. Screw lthreadedlyV 4er :otherwise atv tached to the'top ofthe caipfis `the sucker or pump-rod 9. f

I will now describe the arrangement of the packing on the tube 4, and the manner in which the plunger valve is opened and closed. A plurality of metallic cup-shaped members 10 are mounted on the tube, and arranged between the metallic members are the fabric cup-shaped members l1. The metallic members are all screw threadedly connected with the fabric members between them, as clearly illustrated in Figure 2. One of the metallic cups forms the upper end of the packing and it is adapted to abut against the shoulder l2 of the cap to limit the Inovement of the packing member in that direction. Screw threadedly mounted on the lower metallic cup is a valve seat 18 which cooperates with the valve member 5. The

simplicity of this structure is apparent7 and it is of very material importance. It Will be noted that the packing elements themselves form a unitary structure which is slidable on the tube 4, and thus the necessity for another tube, or similar element, for carrying the packing is entirely eliminated. And it will also be noted that the valve seat is mounted directly on the packing elements, thereby reducing the structure to the utmost simplicity.

The operation of the apparatus will no doubt be clearly understood from the foregoing description of the construction; but it may be briefly described as follows:

Assume the plunger is at the bottom of its stroke and is about to start its upward movement; the relative position of the elements being as illustrated in Figures l and 2. lhen the pump or sucker rod is lifted the tube t and valve member 5 move upwardly therewith through the unitary packing member until the valve member 5 engages the seat 13, as clearly indicated in Figure 3, and upon farther upward movement of the pump rod the packing, tube and valve member move upwardly together, thereby lifting and discharging the oil or other liquid above it. At t1 e same time that it is lifting the liquid above it it is also drawing liquid into the bottom of the barrel through the standing valve 2. Now when the plunger is lowered the tube and valve member first move downwardly, unseating the valve and opening the aperture G; the position of the parts being as illustrated in Figures l and 2. As the plunger moves on downwardly the apertures remain open and the oil or other liquid passes through those openings, through the tube l, and is disc arged freely through the larger openings in the cap. The operation is now repeated, the valve being seated, the apertures 6 closed, and the plunger elevated.

In accordance with the patent statutes, I have described what I now believe to be the best embodiment of the invention, but I de not wish it to be understood thereby as limiting myself or the scope of the invention, as many changes and modifications may be made without departing from the spirit of the invention; all such I aim to include in the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

l. A plunger for pumps, including a cap attached to the pump rod, a tubular member attached to the cap, and a valve member attached to the lower end of the tubular member, said cap provided with apertures always in communication with the interior of the tubular member and the space above the plunger, and said tubular member provided with apertures just above the valve member.

2. A plunger for pumps, including a cap attached to the pump rod, a tubular member attached to the cap, and a valve member attached to the lower end of the tubular member, said cap provided with apertures, and said tubular member provided with apertures just above the valve member, the apertures in the `cap being larger than those in the tubular member.

3. plunger' 'for pumps, including a tubular member, means for attaching said tubular member to the pump rod, communicating means always open between the interior of the tubular member and the space above the plunger, a valve member attached to the lower end of the tubular member, said tubular member provided with apertures adjacent the valve member.

4. A plunger for pumps, including a cap attached to the pump rod, a tubular member attached to the cap, a valve member attached to the lower end of the tubular member, said cap provided with apertures, said tubular member provided with apertures adjacent the valve member, packing elements mounted directly on the tubular member, and a valve seat mounted on the packing elements.

TRUMAN A. ED GERLY. 

